Kadamba "cha"
Kadamba derived from Bhattiprolu script, and was the ancestor of two more modern scripts, Kannada and Telugu. There is very little information about the script. It is even sometimes called “Pre-Old-Kannada script”, which just goes to show how little of an independent identity it has.
Kadamba and Old Kannada glyphs are quite similar, so the line between the two is somewhat blurred.
Links: Wikipedia, Ancient Scripts
Pingback: Old Kannada — 1100 AD, India | Glyph of the Day